The primary source of energy for all cellular processes is a molecule known as ATP (adenosine triphosphate). Healthy, active cells constantly replenish their supply of ATP to produce vital cellular energy. However, under conditions of stress, injury, or aging, critical body tissues such as heart and skeletal muscles cannot produce ATP quickly enough to perform optimally. D-ribose, a carbohydrate molecule found in every living organism, facilitates the production of ATP. In studies of healthy athletes, supplying fatigued muscle cells with D-ribose quickly restored ATP levels to normal. By helping to rapidly refill depleted energy stores, D-ribose may be especially beneficial for heart health. D-Ribose Tablets and D-Ribose Powder can help speed energy recovery, increase energy reserves and maintain healthy energy levels in heart and muscle tissue.